Publisher : The Korean Institute of Electrical Engineers
DOI : 10.5370/KIEE.2016.65.6.911
Title & Authors
An Analysis on Fault Response Characteristics in Low Voltage DC Distribution System Noh, Chul-Ho; Gwon, Gi-Hyeon; Song, Jong-Il; Han, Joon; Oh, Yun-Sik; Kim, Chul-Hwan;
DC-based power system is paid attention as interests in energy efficiency and power quality are increased. However, standardization and researches for commercializing Low Voltage DC(LVDC) distribution system are still insufficient. Protection system, which is closely related with reliability, power quality, safety, and life expectancy of components in power system, is also included. This paper therefore analyzes fault response characteristics in LVDC distribution system as a preliminary study on protection schemes. A stepwise analysis on fault current from both AC/DC converter and DC/DC converter is performed and related expressions are derived. And then, modeling and simulation with various conditions are conducted by using ElectroMagnetic Transients Program (EMTP) to verify analysis results. Based on research results in the paper, direction for development of protection schemes for LVDC distribution system is suggested.
Low voltage distribution system;Fault response characteristics;Power converter;